exocoelomic cavity
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exocoelomic cavity — the cavity surrounded by the exocoelomic membrane and roofed by the hypoblast during implantation and formation of the bilaminar embryonic disc in human embryonic development. The cavity and surrounding membrane will become the yolk sac … Medical dictionary
exocoelomic membrane — a layer of flattened cells that develops as a lining of the blastocyst or chorionic cavity just after implantation. Together with the hypoblast, it forms the covering layer of the primary yolk sac. Called also Heuser m … Medical dictionary
Human embryogenesis — is the process of cell division and cellular differentiation of the human embryo during early prenatal development. It spans from the moment of fertilization to the end of the 8th week of gestational age, whereafter the embryo is called a fetus.… … Wikipedia
Yolk sac — Not all yolk has to do with birds’ eggs. Human embryos have a yolk sac, a membrane outside the embryo but connected by a tube (the yolk stalk) though the umbilical opening to the embryo’s midgut. The yolk sac serves as an early site for … Medical dictionary
Heuser's membrane — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Caption2 = System = CarnegieStage = Days = 12 Precursor = GivesRiseTo = extraembryonic coelom MeshName = MeshNumber = DorlandsPre = m 08 DorlandsSuf = 12522719 Heuser s … Wikipedia
Yolk sac — Infobox Embryology Name = Yolk sac Latin = GraySubject = 11 GrayPage = 54 Caption = Human embryo of 2.6 mm. Caption2 = Human embryo from thirty one to thirty four days System = CarnegieStage = 5b Days = 9 Precursor = endoderm GivesRiseTo =… … Wikipedia
